New posts in functions

Why is $y = \sqrt{x-4}$ a function? and $y = \sqrt{4 - x^2}$ should be a circle

algebra-precalculus functions graphing-functions relations

How to make the argument as optional in bash?

bash functions

How to proof the following function is always constant which satisfies $f\left( x \right) + a\int_{x - 1}^x {f\left( t \right)\,dt} $?

calculus integration functions

An injection between finite sets of equal size must be a bijection

functions elementary-set-theory

Finding limit without using limit

sequences-and-series limits functions exponential-function

Determine whether or not the function f it is bijective 2f(3-2x)+f(3/2-x/2)=x, where x is a real number

functions functional-equations

Find all functions $f:\mathbb N\to \mathbb N$ such that $\frac{4f(x)f(y-3)}{f(x)f(y-2)+f(y)f(x-2)}$ is an integer for all $x>2$ and $y>3$.

elementary-number-theory functions contest-math functional-equations

Nonpiecewise Function Defined at a Point but Not Continuous There

calculus limits functions continuity examples-counterexamples

Maximum of the Variance Function for Given Set of Bounded Numbers

probability analysis statistics functions variance

Definite integral of an odd function is 0 (symmetric interval)

integration functions

Function in $H^1$, but not continuous

functional-analysis functions sobolev-spaces examples-counterexamples

Is it possible for a word in a sentence to have two grammatical functions at once?

grammar syntactic-analysis functions

Clarifying the definitions of image and pre-image

functions elementary-set-theory

How $x^4$ is strictly convex function?

functions convex-analysis

Find all function satisfying $f(f(n))+f(n)=2n+3k$

functions recurrence-relations functional-equations

How to prove this limit composition theorem?

real-analysis limits functions continuity

When are algebraic expressions equivalent?

algebra-precalculus functions equivalence-relations

If $f(x)f(y)=f(\sqrt{x^2+y^2})$ how to find $f(x)$

calculus functions

An endpoint of a closed interval where the derivative is zero is considered a critical point?

calculus analysis functions derivatives extreme-value-theorem

What does a mini circle between f and h(x) mean?

functions notation